import { asyncRouterMap, constantElementMap, constantRouterMap } from '@/router'

/**
 * 通过meta.role判断是否与当前用户权限匹配
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.findIndex(x => role.search(x) >= 0) >= 0)
  } else {
    return true
  }
}

/**
 * 递归过滤异步路由表，返回符合用户角色权限的路由表
 * @param asyncRouterMap
 * @param roles
 */
function filterAsyncRouter(asyncRouterMap, roles) {
  const accessedRouters = asyncRouterMap.filter(route => {
    if (hasPermission(roles, route)) {
      if (route.children && route.children.length) {
        route.children = filterAsyncRouter(route.children, roles)
      }
      return true
    }
    return false
  })
  return accessedRouters
}

const permission = {
  state: {
    routers: [],
    addRouters: []
  },
  mutations: {
    setRouters(state, routers) {
      state.addRouters = routers
      state.routers = routers // constantRouterMap.concat(routers)
    }
  },
  actions: {
    setRouters({ commit }, data) {
      return new Promise(resolve => {
        const { roles, userName } = data
        let accessedRouters = []
        if (userName.indexOf('admin') >= 0) {
          accessedRouters = asyncRouterMap
        } else {
          accessedRouters = filterAsyncRouter(asyncRouterMap, roles)
        }
        // 开发环境时，将constantElementMap添加到路由中
        if (import.meta.env.MODE === 'development') {
          accessedRouters = accessedRouters.concat(constantElementMap)
        }
        commit('setRouters', accessedRouters)
        resolve()
      })
    },
    // 不需要远程api获取路由，直接获取不需要权限的路由
    setLocalRouters({ commit }) {
      return new Promise(resolve => {
        let accessedRouters = []
        accessedRouters = asyncRouterMap
        accessedRouters = accessedRouters.concat(constantElementMap)
        commit('setRouters', accessedRouters)
        resolve()
      })
    }
  }
}
export default permission

